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Excavating Machinery Maintenance

AKW GROUP | Updated: Sep 04, 2017

Excavator, also known as excavation machinery, is to use the bucket to dig above or below the bearing surface of the material, and into the transport vehicle or unloading to the stacking of earthwork machinery, has become the construction of the most important engineering machinery one. In use, reasonable maintenance is to extend the useful life of the machine means.

Daily inspection work is to ensure that hydraulic excavators can maintain long-term efficient operation of the important part, especially for self-employed, do the usual daily inspection work can effectively reduce maintenance costs. First, the first turn around the machine to check the appearance of both the mechanical chassis and whether the same, and whether the rotation of the oil out of the support, and then check the slowdown of the brake device and the track fastener, the tightening of the tight, the replacement for the timely replacement, if Is a wheeled excavator on the need to check whether the tire is the same, and the stability of air pressure.

1, fuel management

Diesel oil can not be mixed with impurities, lime and water, otherwise it will make the fuel pump prematurely wear; low-grade fuel in the paraffin and sulfur content is high, will damage the engine; daily operation After the fuel tank to fill the fuel tank to prevent the tank wall to produce water droplets; daily operation before the opening of the fuel tank at the end of the discharge valve water; in the engine fuel exhaustion or replacement filter, the line must be exhausted in the air.

2, the management of other oil

Other oil, including engine oil, hydraulic oil, gear oil, etc .; different grades and different grades of oil can not be mixed; different varieties of excavator oil in the production process to add the chemical or physical effects of additives are different; Clean with oil, prevent debris (water, dust, particles, etc.) mixed; according to the ambient temperature and use of oil label. High ambient temperature, should use the viscosity of the oil, the ambient temperature should be selected low viscosity of the oil; gear oil viscosity is relatively large, to adapt to the larger transmission load, hydraulic oil viscosity is relatively small to reduce the flow of liquid resistance.

3, grease management

The use of lubricating oil (butter) can reduce the wear of the moving surface to prevent noise. Grease, storage and storage, can not be mixed with dust, sand, water and other impurities; recommend the use of lithium-based grease g2-l1, anti-wear performance, suitable for heavy load conditions; filling, Out and clean, to prevent sand adhesion.

4, filter maintenance

The filter cartridge to filter the oil or gas in the role of impurities, to prevent its intrusion into the system caused by internal failure; a variety of filter in accordance with the (operation and maintenance manual) requirements of the regular replacement; replacement filter, should check whether the metal attached to the old Filter, such as the discovery of metal particles in time to diagnose and take measures to improve; use of machinery in line with the provisions of the pure filter. Fake filter filter capacity is poor, the filter layer of each person and the material quality does not meet the requirements, will seriously affect the normal use of the machine. In the case of

5, regular maintenance of the content

① new machine work after 250h should be replaced fuel filter and additional fuel filter; check the engine valve clearance.

② check and adjust the crawler backlash; check the intake heater; replace the bucket teeth; adjust the bucket gap; check before the check; check the front of the air; Check the air conditioning; clean the cab floor; replace the breaker filter (optional). Clean the inside of the cooling system, until the engine is fully cooled, slowly loosen the nozzle cover, the release of the internal pressure of the tank, and then to the water; do not work in the engine cleaning work, high-speed rotation of the fan will cause danger; when cleaning or replacement cooling Liquid, the machine should be parked on the level of the ground.

③ start the engine before the inspection items. Check the oil level (plus oil); check the hydraulic oil level (plus hydraulic oil); check the air filter is blocked; check the wire; check the oil level (plus water); check the engine oil level, Check the horn is normal; check the bucket lubrication; check the oil and water separator in the water and sediment.

④ every 100 maintenance items. Boom cylinder head pin; boom pin; boom cylinder cylinder end; bucket cylinder cylinder pin; boom, stick connecting pin; rod cylinder cylinder end; bucket cylinder cylinder pin ; The rod rod connecting pin; the rod, the bucket cylinder cylinder end; the bucket cylinder cylinder pin; the rod connecting rod connecting pin; check the rotary unit tank oil level (plus oil); from the fuel tank Discharge water and sediment.

⑤ every 250h maintenance project. Check the oil level in the final gearbox (add the gear oil); check the battery electrolyte; replace the oil in the engine oil pan, replace the engine filter; lubricate the slewing ring (2); check the tension of the fan belt and check Air conditioning compressor belt tension, and make adjustments.

⑥ every 500h maintenance project. (Plus grease); check and clean the radiator fins, oil cooler heat sinks and chillers heat sinks; replace the hydraulic oil Filter; replace the oil in the final gear box (only for the first time at 500h, after 1000h once); clean the air conditioner inside and outside the air filter; replace the hydraulic oil vent filter.

⑦ every 1000h maintenance project. (Oil); check all the fasteners of the turbocharger; check the turbocharger rotor Of the clearance; generator belt tension check and replacement; replace the anti-corrosion filter; replace the final gear box of oil.

⑧ every 2000h maintenance project. First, complete the maintenance of each 100,250,500 and 1000h; clean the hydraulic tank filter; clean, check the turbocharger; check the generator, start the motor; check the engine valve clearance (and adjust); check the shock absorber.

⑨ more than 4000000 maintenance. Every 4000h increase the pump check; every 5000h increase the replacement of hydraulic oil project.

⑩ long-term storage. When the machine is stored for a long time, in order to prevent the hydraulic cylinder piston rod rust, the working device should be placed on the ground; the whole machine is washed and dried and stored in an indoor dry environment; if the conditions can only be stored in the room, The machine is parked on the well-drained concrete floor; before filling the fuel tank, lubricate the parts, replace the hydraulic oil and oil, the hydraulic cylinder piston rod exposed metal surface coated with a thin layer of butter, remove the battery negative terminal, or The battery will be stored separately; according to the minimum ambient temperature in the cooling water by adding the appropriate proportion of antifreeze; start the engine once a month and operate the machine in order to lubricate the moving parts, while charging the battery; open air conditioning and cooling operation 5-10min.

There is a saying that "good work must first of its profits," effective maintenance can reduce the chance of machine failure. The above is about the maintenance method of the excavator, hoping to bring help to the needy friends.